L-systems were developed in 1968 by the Hungarian biologist Aristid Lindenmayer. It's powerful recursive technique for describing natural-looking organic forms.

Many of us studied the turtle graphics(LOGO) at school or university at Computer science lessons. Here the turtle control by next rules:
"F" move Forward
"B" move Backward
"+" or "Y" turn y Left by angle (here 30°)
"-" or "y" turn y Right by angle
"&" or "X" pitch x Left by angle
"^" or "x" pitch x Right by angle
">" or "Z" roll z Left by angle
"<" or "z" roll z Right by angle

Here start point of turtle in area of coccyx.
Copy and paste command to play with L-system
F:[[BB]+B^^B]F[[-FF]+++F--^F]F

Model Yulya Bondareva
Thanks Ingrida Adomaytite

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